9-Way RadeonSI GPU Tests On Mesa 17.1 + Linux 4.11

And the Dota 2 OpenGL/Vulkan results at 4K.

ET: Legacy continues to be a fun open-source game test with its modern OpenGL 3 renderer compared to the original game.

Metro Last Light Redux is one of the games where it triggers the Radeon R9 290 to actually clock correctly, or at least otherwise is meeting performance expectations here.